In this shared folder are some results of running AudioFeedbackLatencyTest with Verbosity == 10. The txt files are >1000 lines long so I’m not posting them directly here. Note that what the latency test reports as “mean offset latency” matches what my independent results are getting for round trip; the latency test’s “roundtrip latency” is much shorter than my measured round trip latency.
I tested with sampling rates of 48 and 96 kHz and got very similar results for the MOTU Microbook, still right around 32 ms. For the Focusrite Scarlett Solo, 48 -> 96 kHz went from 125 -> 114 ms latency. The RMS Babyface Pro FS @ 96kHz and reqlatencyclass == 4 got 80 ms latency. That finding was particularly painful, since it seems the Babyface is touted as top of the line. All devices are using up to date first-party drivers.
My computer already has the HDAudio device installed, and as far as I can tell, it is in use. It would be great to continue using Windows for various reasons, not the least of which is that I’ve never used Linux before. But if Windows ain’t doing it, I’ll figure out another OS.